MASTERPIECE CLASSIC Downton Abbey, Season 5, Part 4 of 9

Air date: Sun., Jan. 25, 8:00 pm

This Emmy and Golden Globe award-winning hit drama returns for a fifth season of intimately interlaced stories centered on an English country estate – an entertaining formula that has made “Downton Abbey” the highest-rated drama in PBS history. The acclaimed ensemble cast is joined by guest stars Harriet Walter as Lady Shackleton and Peter Egan as Lord Flintshire, together with new characters played by Richard E. Grant, Anna Chancellor and Rade Sherbedgia.

Part 4 of 9
Lord Merton delivers a bombshell to Isobel, and Mary does likewise to Tony. Police suspicions deepen in an unexplained death. Robert and Sarah lock horns.